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Kawachi Y, Ogawa K, Osakabe M, Kawamoto Y, Isobe M, Ida K. Fast-sampling fast-ion D-alpha measurement using multi-anode photomultiplier tube in large helical device. Rev Sci Instrum 2023; 94:103505. [PMID: 37819204 DOI: 10.1063/5.0159175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 09/20/2023] [Indexed: 10/13/2023]
Abstract
A fast-sampling fast-ion D-alpha (F-FIDA) measurement has been developed in the large helical device in order to investigate fast ion dynamics associated with helically trapped fast-ion-driven Magnetohydrodynamic (MHD) bursts. F-FIDA consists of a multi-anode photomultiplier tube (PMT) and achieves a sampling rate of 10 kHz. During the deuterium experiment campaign in 2022, F-FIDA measured the spectrum of perpendicular fast ions, using perpendicular lines of sight. We compared F-FIDA with conventional FIDA, using an electron multiplying charge coupled device, and confirmed that the time-averaged images were generally consistent between the two. The statistical properties of the temporal evolution associated with MHD bursts were analyzed using a conditional sampling technique. The results showed that the PMT signal varied in different spatial and wavelength channels. Although the signal-to-noise ratio was poor and there was room for improvement, it could provide useful information for studies on the phase-space dynamics of fast ions.
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Affiliation(s)
- Y Kawachi
- Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Sakyo Ward, Kyoto 606-8585, Japan
| | - K Ogawa
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- The Graduate University for Advanced Studies, SOKENDAI, Toki, Japan
| | - M Osakabe
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- The Graduate University for Advanced Studies, SOKENDAI, Toki, Japan
| | - Y Kawamoto
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- The Graduate University for Advanced Studies, SOKENDAI, Toki, Japan
| | - M Isobe
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- The Graduate University for Advanced Studies, SOKENDAI, Toki, Japan
| | - K Ida
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- The Graduate University for Advanced Studies, SOKENDAI, Toki, Japan
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2
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Kimura K, Matsuura H, Itoh C, Kawamoto Y, Oishi T, Goto M, Ogawa K, Nishitani T, Isobe M, Osakabe M. Optimization of a fast deuterium diagnostic method based on visible energetic 3He spectroscopy for high electron density plasmas. Rev Sci Instrum 2023; 94:063502. [PMID: 37862490 DOI: 10.1063/5.0110088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 05/22/2023] [Indexed: 10/22/2023]
Abstract
Fast ions play a crucial role in plasma heating, and their behavior in the plasma must be accurately understood. A diagnostics method based on charge exchange emission from the n = 4 - 3 transition (λ0 = 468.6 nm) of energetic 3He produced by the deuteron-deuteron reaction has been proposed as a for fast deuterons with energies in the order of MeV. The proposed method has the following advantages: No beam emission interferes with the spectra, the direction of the measuring line of sight, and the injection angle of the diagnostic beam can be freely determined. In previous studies, due to competing bremsstrahlung, it was expected that the proposed method will not be practical in the case of high electron density operation. This paper makes the proposed method available for measurement even at high electron densities by optimizing the measurement line of sight direction and the diagnostic beam incidence angle. This allows an electron density five times larger than the range of applications shown in previous studies. This result will contribute to measure of DT alpha in ITER.
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Affiliation(s)
- K Kimura
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - H Matsuura
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - C Itoh
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Y Kawamoto
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Oishi
- Department of Quantum Science and Energy Engineering, Tohoku University, 6-6-01-2 Aobayama, Sendai 980-8579, Japan
| | - M Goto
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Nishitani
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M Isobe
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki 509-5292, Japan
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3
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Funaba H, Yasuhara R, Uehara H, Yamada I, Sakamoto R, Osakabe M, Den Hartog DJ. Electron temperature and density measurement by Thomson scattering with a high repetition rate laser of 20 kHz on LHD. Sci Rep 2022; 12:15112. [PMID: 36068266 PMCID: PMC9448754 DOI: 10.1038/s41598-022-19328-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 08/29/2022] [Indexed: 11/30/2022] Open
Abstract
Thomson scattering measurements with a high-repetition-rate laser have commenced in the Large Helical Device. As an example of the fast phenomena captured by this diagnostic system, measurements at a 20 kHz repetition-rate in hydrogen pellet-injected plasmas are presented. Signal processing methods for this measurement have been developed and electron temperature profiles with almost 70 spatial points were evaluated at time intervals of 50 [Formula: see text]s. After Raman scattering calibration, electron density profiles were derived. Fast changes in the electron temperature and density profiles within 1 ms were observed.
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Affiliation(s)
- H Funaba
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu, 509-5292, Japan.
| | - R Yasuhara
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu, 509-5292, Japan.
| | - H Uehara
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu, 509-5292, Japan
| | - I Yamada
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu, 509-5292, Japan
| | - R Sakamoto
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu, 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu, 509-5292, Japan
| | - D J Den Hartog
- Department of Physics, University of Wisconsin-Madison, Madison, WI, 53706-1390, USA
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4
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Ogawa K, Isobe M, Nuga H, Seki R, Ohdachi S, Osakabe M. Evaluation of Alpha Particle Emission Rate Due to the p- 11B Fusion Reaction in the Large Helical Device. Fusion Science and Technology 2022. [DOI: 10.1080/15361055.2021.1973294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- K. Ogawa
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
- The Graduate University for Advanced Studies, Sokendai, Toki 509-5292, Japan
| | - M. Isobe
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
- The Graduate University for Advanced Studies, Sokendai, Toki 509-5292, Japan
| | - H. Nuga
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - R. Seki
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
- The Graduate University for Advanced Studies, Sokendai, Toki 509-5292, Japan
| | - S. Ohdachi
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
- University of Tokyo, Tokyo 113-8654, Japan
| | - M. Osakabe
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
- The Graduate University for Advanced Studies, Sokendai, Toki 509-5292, Japan
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5
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Warmer F, Tanaka K, Xanthopoulos P, Nunami M, Nakata M, Beidler CD, Bozhenkov SA, Beurskens MNA, Brunner KJ, Ford OP, Fuchert G, Funaba H, Geiger J, Gradic D, Ida K, Igami H, Kubo S, Langenberg A, Laqua HP, Lazerson S, Morisaki T, Osakabe M, Pablant N, Pasch E, Peterson B, Satake S, Seki R, Shimozuma T, Smith HM, Stange T, Stechow AV, Sugama H, Suzuki Y, Takahashi H, Tokuzawa T, Tsujimura T, Turkin Y, Wolf RC, Yamada I, Yanai R, Yasuhara R, Yokoyama M, Yoshimura Y, Yoshinuma M, Zhang D. Impact of Magnetic Field Configuration on Heat Transport in Stellarators and Heliotrons. Phys Rev Lett 2021; 127:225001. [PMID: 34889640 DOI: 10.1103/physrevlett.127.225001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 07/30/2021] [Accepted: 09/20/2021] [Indexed: 06/13/2023]
Abstract
We assess the magnetic field configuration in modern fusion devices by comparing experiments with the same heating power, between a stellarator and a heliotron. The key role of turbulence is evident in the optimized stellarator, while neoclassical processes largely determine the transport in the heliotron device. Gyrokinetic simulations elucidate the underlying mechanisms promoting stronger ion scale turbulence in the stellarator. Similar plasma performances in these experiments suggests that neoclassical and turbulent transport should both be optimized in next step reactor designs.
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Affiliation(s)
- Felix Warmer
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - K Tanaka
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- Kyushu University, Interdisciplinary Graduate School of Engineering Sciences, Plasma and Quantum Science and Engineering, Kasuga, Fukuoka 816-8580, Japan
| | - P Xanthopoulos
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - M Nunami
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
- Nagoya University, Graduate School of Science, Nagoya 464-8603, Japan
| | - M Nakata
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - C D Beidler
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - S A Bozhenkov
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - M N A Beurskens
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - K J Brunner
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - O P Ford
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - G Fuchert
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - H Funaba
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
| | - J Geiger
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - D Gradic
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - K Ida
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - H Igami
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
| | - S Kubo
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- Nagoya University, Graduate School of Science, Nagoya 464-8603, Japan
| | - A Langenberg
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - H P Laqua
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - S Lazerson
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - T Morisaki
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - E Pasch
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - B Peterson
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
| | - S Satake
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - R Seki
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - T Shimozuma
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
| | - H M Smith
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - T Stange
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - A V Stechow
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - H Sugama
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - Y Suzuki
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - H Takahashi
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - T Tokuzawa
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - T Tsujimura
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - Y Turkin
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - R C Wolf
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
| | - I Yamada
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
| | - R Yanai
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
| | - R Yasuhara
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - M Yokoyama
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - Y Yoshimura
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
| | - M Yoshinuma
- National Institute for Fusion Science, National Institutes on Natural Sciences, Toki, 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - D Zhang
- Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany
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Kimura K, Matsuura H, Kawamoto Y, Oishi T, Goto M, Ogawa K, Nishitani T, Isobe M, Osakabe M. Fast deuteron diagnostics using visible light spectra of 3He produced by deuteron-deuteron reaction in deuterium plasmas. Rev Sci Instrum 2021; 92:053524. [PMID: 34243281 DOI: 10.1063/5.0034683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 04/23/2021] [Indexed: 06/13/2023]
Abstract
The fast deuteron (non-Maxwellian component) diagnostic method, which is based on the higher resolution optical spectroscopic measurement, has been developed as a powerful tool. Owing to a decrease in the D-H charge-exchange cross section, the diagnostic ability of conventional optical diagnostic methods should be improved for ∼MeV energy deuterons. Because the 3He-H charge-exchange cross section is much larger than that of D-H in the ∼MeV energy range, the visible light (VIS) spectrum of 3He produced by the dueteron-dueteron (DD) reaction may be a useful tool. Although the density of 3He is small because it is produced via the DD reaction, improvement of the emissivity of the VIS spectrum of 3He can be expected by using a high-energy beam. We evaluate the VIS spectrum of 3He for the cases when a fast deuteron tail is formed and not formed in the ITER-like beam injected deuterium plasma. Even when the beam energy is in the MeV energy range, a large change appears in the half width at half maximum of the VIS spectrum. The emissivity of the VIS spectrum of 3He and the emissivity of bremsstrahlung are compared, and the measurable VIS spectrum is obtained. It is shown that the VIS spectrum of 3He is a useful tool for the MeV beam deuteron tail diagnostics.
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Affiliation(s)
- K Kimura
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - H Matsuura
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Y Kawamoto
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Oishi
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Goto
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Nishitani
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M Isobe
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
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7
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Kamio S, Fujiwara Y, Ogawa K, Kobayashi MI, Sangaroon S, Isobe M, Seki R, Nuga H, Osakabe M, Matsuyama S, Miwa M, Toyama S. Neutron-induced signal on the single crystal chemical vapor deposition diamond-based neutral particle analyzer. Rev Sci Instrum 2020; 91:113304. [PMID: 33261440 DOI: 10.1063/5.0020460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 10/29/2020] [Indexed: 06/12/2023]
Abstract
A diamond-based neutral particle analyzer (DNPA) array composed of single-crystal chemical vapor deposition (sCVD) diamond detectors was installed on the Large Helical Device (LHD) for measuring the helically trapped energetic particles. In high neutron flux experiments, the unwanted neutron-induced pulse counting rate should be estimated using the neutron diagnostics because a diamond detector is sensitive to neutrons as well as energetic neutral particles. In order to evaluate the quantitative neutron-induced pulse counting rate on the DNPA, the response functions of the sCVD diamond detector for mono-energetic neutrons were obtained using accelerator-based D-D and D-7Li neutron sources in Fast Neutron Laboratory (FNL). As a result of the neutron flux estimation by the Monte Carlo N-Particle code at the NPA position in the LHD and the response function obtained in the FNL experiment, the counting rate of the neutron-induced signal was predicted to be 1.1 kcps for the source neutron emission rate of Sn = 1 × 1015 n/s. In the LHD experiment, the neutron-induced signals were observed by closing the gate valve during the plasma discharges. It is found that the counting rates of the neutron-induced signals proportional to Sn reached 1.1 kcps at Sn = 1 × 1015 n/s. As a result of the quantitative estimation of the neutron-induced signals on the DNPA using other neutron measurements, it has become possible to accurately measure energetic neutral particles in the high neutron flux experiment.
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Affiliation(s)
- S Kamio
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y Fujiwara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M I Kobayashi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S Sangaroon
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Isobe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - R Seki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - H Nuga
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S Matsuyama
- Tohoku University, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - M Miwa
- Tohoku University, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - S Toyama
- Tohoku University, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
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8
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Sangaroon S, Ogawa K, Isobe M, Kobayashi MI, Fujiwara Y, Kamio S, Seki R, Nuga H, Yamaguchi H, Osakabe M. Performance of the newly installed vertical neutron cameras for low neutron yield discharges in the Large Helical Device. Rev Sci Instrum 2020; 91:083505. [PMID: 32872928 DOI: 10.1063/5.0010302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 07/24/2020] [Indexed: 06/11/2023]
Abstract
Two new vertical neutron cameras characterized by high detection efficiency were developed on the Large Helical Device in order to observe poloidal structures of helically trapped beam ions created by the perpendicularly injected positive-ion based neutral beam (P-NB) and are newly operated since 2018. In this work, the neutron fields at the vertical neutron cameras are investigated using the Monte Carlo N-particle transport code to evaluate the performance of its collimators. The results indicate that neutrons are attenuated by the heavy concrete and are well collimated through the collimator to detectors. Neutron spectra at the detector position show over 99% of uncollided 2.45 MeV neutrons. Time evolution of neutron emission profiles during the short pulse of P-NB injection is measured by the vertical neutron cameras. Peaks on the neutron emission profiles corresponding to the helically trapped beam ion are successfully obtained, as designed. The decrease in line integrated neutron flux at the peak positions after the P-NB stops is consistent with the behavior of the total neutron emission rate measured by the neutron flux monitor.
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Affiliation(s)
- S Sangaroon
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - M Isobe
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - M I Kobayashi
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - Y Fujiwara
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - S Kamio
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - R Seki
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - H Nuga
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - H Yamaguchi
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
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9
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Kisaki M, Nakano H, Tsumori K, Ikeda K, Masaki S, Haba Y, Fujiwara Y, Nagaoak K, Osakabe M. Study of correlation between plasma parameter and beam optics. Rev Sci Instrum 2020; 91:023503. [PMID: 32113389 DOI: 10.1063/1.5131102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
Simultaneous measurement of negative ion source plasma and extracted beam is carried out in order to clarify a key plasma parameter governing the meniscus formation in negative ion sources for fusion. The plasma discharge is performed with various discharge powers at different bias voltages in order to vary the plasma parameters. It is shown that the beam width changes along the same curve with respect to the negative ion density at any bias voltage while it varies along different curves with other plasma parameters depending on the bias voltage. This implies that the mechanism of meniscus formation in negative ion sources could be described along the similar manner as positive ion sources.
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Affiliation(s)
- M Kisaki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H Nakano
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K Tsumori
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K Ikeda
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S Masaki
- The Graduate University for Advanced Studies, SOKENDAI, Toki, Gifu 509-5292, Japan
| | - Y Haba
- Graduate School of Science, Nagoya University, Nagoya 464-8601, Japan
| | - Y Fujiwara
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K Nagaoak
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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10
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Masaki S, Nakano H, Kisaki M, Haba Y, Nagaoka K, Ikeda K, Fujiwara Y, Osakabe M, Tsumori K. Spatial distribution of negative ion density near the plasma grid. Rev Sci Instrum 2020; 91:013512. [PMID: 32012531 DOI: 10.1063/1.5129705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/28/2019] [Indexed: 06/10/2023]
Abstract
Density distributions of negative hydrogen (H-) ions and negative deuterium (D-) ions were measured with the laser photodetachment method in the extraction region of the negative ion source. The distribution of H- ion density peaks at the center of the ion source, while that of the D- ion shows a flatter profile in the direction parallel to the plasma grid. The positive ion densities of hydrogen and deuterium estimated from the positive saturation current indicate similar profiles with different amounts close to the grid. The difference in the H- ion and D- ion distributions can be explained by the difference in the negative ion yield and the survival probability of the ions due to the isotope effect.
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Affiliation(s)
- S Masaki
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, Toki, Gifu 509-5292, Japan
| | - H Nakano
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, Toki, Gifu 509-5292, Japan
| | - M Kisaki
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, Toki, Gifu 509-5292, Japan
| | - Y Haba
- Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - K Nagaoka
- National Institute for Fusion Science, National Institutes of Natural Science, Toki, Gifu 509-5292, Japan
| | - K Ikeda
- National Institute for Fusion Science, National Institutes of Natural Science, Toki, Gifu 509-5292, Japan
| | - Y Fujiwara
- National Institute for Fusion Science, National Institutes of Natural Science, Toki, Gifu 509-5292, Japan
| | - M Osakabe
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, Toki, Gifu 509-5292, Japan
| | - K Tsumori
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, Toki, Gifu 509-5292, Japan
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11
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Yamada H, Tanaka K, Seki R, Suzuki C, Ida K, Fujii K, Goto M, Murakami S, Osakabe M, Tokuzawa T, Yokoyama M, Yoshinuma M. Isotope Effect on Energy Confinement Time and Thermal Transport in Neutral-Beam-Heated Stellarator-Heliotron Plasmas. Phys Rev Lett 2019; 123:185001. [PMID: 31763903 DOI: 10.1103/physrevlett.123.185001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/30/2019] [Indexed: 06/10/2023]
Abstract
The isotope effect on energy confinement time and thermal transport has been investigated for plasmas confined by a stellarator-heliotron magnetic field. This is the first detailed assessment of an isotope effect in a stellarator heliotron. Hydrogen and deuterium plasmas heated by neutral beam injection on the Large Helical Device have exhibited no significant dependence on the isotope mass in thermal energy confinement time, which is not consistent with the simple gyro-Bohm model. A comparison of thermal diffusivity for dimensionally similar hydrogen and deuterium plasmas in terms of the gyroradius, collisionality, and thermal pressure has clearly shown robust confinement improvement in deuterium to compensate for the unfavorable mass dependence predicted by the gyro-Bohm model.
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Affiliation(s)
- H Yamada
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- The University of Tokyo, Kashiwa, Chiba 277-8568, Japan
| | - K Tanaka
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - R Seki
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - C Suzuki
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
| | - K Ida
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
| | - K Fujii
- Kyoto University, Kyoto 615-8530, Japan
| | - M Goto
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | | | - M Osakabe
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - T Tokuzawa
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - M Yokoyama
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
| | - M Yoshinuma
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
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12
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Ikeda K, Tsumori K, Nagaoka K, Nakano H, Kisaki M, Fujiwara Y, Kamio S, Haba Y, Masaki S, Osakabe M. Extension of high power deuterium operation of negative ion based neutral beam injector in the large helical device. Rev Sci Instrum 2019; 90:113322. [PMID: 31779449 DOI: 10.1063/1.5128529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 11/04/2019] [Indexed: 06/10/2023]
Abstract
Second deuterium operation of the negative ion based neutral beam injector was performed in 2018 in the large helical device. The electron and ion current ratio improves to Ie/Iacc(D) = 0.31 using the short extraction gap distance of 7 mm between the plasma grid (PG) and the extraction grid (EG). The strength of the magnetic field by the electron deflection magnet installed in the EG increases by 17% at the PG ingress surface, which effectively reduces the electron component in the negative ion rich plasma in the vicinity of PG apertures. The reduction of the electron current made it possible to operate at a high power arc discharge and beam extraction. Then, the deuterium negative ion current increases to 55.4 A with the averaged current density of 233 A/m2. The thermal load on the EG using 7 mm gap distance is 0.6 times smaller than the thermal load using a 8 mm gap caused by the reduction of coextracted electron current. The injection beam power increases to 2.9 MW in the beam line BL3, and the total beam injection power increases to 7 MW by three beam lines in the second deuterium campaign.
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Affiliation(s)
- K Ikeda
- National Institute for Fusion Science (NIFS), National Institutes of Natural Sciences, 322-6 Oroshi, Toki 509-5292, Japan
| | - K Tsumori
- National Institute for Fusion Science (NIFS), National Institutes of Natural Sciences, 322-6 Oroshi, Toki 509-5292, Japan
| | - K Nagaoka
- National Institute for Fusion Science (NIFS), National Institutes of Natural Sciences, 322-6 Oroshi, Toki 509-5292, Japan
| | - H Nakano
- National Institute for Fusion Science (NIFS), National Institutes of Natural Sciences, 322-6 Oroshi, Toki 509-5292, Japan
| | - M Kisaki
- National Institute for Fusion Science (NIFS), National Institutes of Natural Sciences, 322-6 Oroshi, Toki 509-5292, Japan
| | - Y Fujiwara
- National Institute for Fusion Science (NIFS), National Institutes of Natural Sciences, 322-6 Oroshi, Toki 509-5292, Japan
| | - S Kamio
- National Institute for Fusion Science (NIFS), National Institutes of Natural Sciences, 322-6 Oroshi, Toki 509-5292, Japan
| | - Y Haba
- Graduate School of Science, Nagoya University, Nagoya 464-8603, Japan
| | - S Masaki
- The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science (NIFS), National Institutes of Natural Sciences, 322-6 Oroshi, Toki 509-5292, Japan
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13
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Haba Y, Nagaoka K, Tsumori K, Kisaki M, Nakano H, Ikeda K, Fujiwara Y, Kamio S, Yoshimura S, Osakabe M. Development of a dual beamlet monitor system for negative ion beam measurements. Rev Sci Instrum 2018; 89:123303. [PMID: 30599604 DOI: 10.1063/1.5056260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 11/25/2018] [Indexed: 06/09/2023]
Abstract
To evaluate negative ion beam properties, a dual beamlet monitor system has been developed. The dual beamlet monitor system has two diagnostics in one hexagonal box. One diagnostic is a "fast beamlet monitor" for measuring the time evolution of beamlet current profiles with the time resolution of up to 25 MHz. The other diagnostic is a "pepper-pot-type phase space analyzer," which is applied for the evaluation of a phase space structure of the negative ion beamlet. The dual beamlet monitor system is applied to the measurement of the beamlet in the Neutral Beam Test Stand at National Institute for Fusion Science (NIFS-NBTS), in which the beam accelerator is almost identical to those of working beam injectors in the large helical device. It is demonstrated that the overlapping components from the neighboring beamlet can be eliminated, and the phase space structure can be obtained for the single beamlet.
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Affiliation(s)
- Y Haba
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - K Nagaoka
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - K Tsumori
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Kisaki
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - H Nakano
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ikeda
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y Fujiwara
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S Kamio
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S Yoshimura
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
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14
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Abstract
SummaryMCI–9042, (±)–1–[2–[2–(3–methoxyphenyl)ethyl]phenoxy]–3–(dimethylamino)–2–propyl hydrogen succinate hydrochloride inhibited platelet aggregation induced by collagen and secondary aggregation by ADP or epinephrine at 10−6 M level in platelets of various species. The antiplatelet effect of MCI–9042 was potentiated in aggregation induced by a combination of serotonin with collagen. IC50 value of human platelet aggregation by the serotonin plus collagen was 1.0 × 10−7 M. MCI–9042 inhibited serotonin release accompanied with collagen-induced platelet aggregation, while it did not affect serotonin uptake into platelet. MCI–9042 also potently inhibited the S2-serotonergic receptor-mediated contraction of rat caudal artery by serotonin in a competitive manner with a Ki value of 1.79 × 10–8 M, while Si receptor- or adrenergic receptor-mediated vasoconstriction was inhibited more weakly. Platelet adhesiveness, c-AMP level in platelets and the conversion of arachidonic acid to thromboxane A2 were not influenced by MCI–9042. These results suggest that MCI–9042 is a selective S2-serotonergic receptor antagonist, exhibiting the inhibition of S2-serotonergic potentiated platelet aggregation and the suppression of blood vessel constriction mediated by S2-serotonergic receptor.
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Affiliation(s)
- H Hara
- Pharmaceuticals Laboratory Research Center, Mitsubishi Kasei Corporation, Yokohama, Japan
| | - M Osakabe
- Pharmaceuticals Laboratory Research Center, Mitsubishi Kasei Corporation, Yokohama, Japan
| | - A Kitajima
- Pharmaceuticals Laboratory Research Center, Mitsubishi Kasei Corporation, Yokohama, Japan
| | - Y Tamao
- Pharmaceuticals Laboratory Research Center, Mitsubishi Kasei Corporation, Yokohama, Japan
| | - R Kikumoto
- Pharmaceuticals Laboratory Research Center, Mitsubishi Kasei Corporation, Yokohama, Japan
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15
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Nakanishi H, Yokota M, Aoyagi M, Ohsuna M, Ito T, Imazu S, Nonomura M, Ogawa K, Isobe M, Akata N, Tanaka M, Saze T, Nishimura K, Hayashi H, Miyake H, Ogawa H, Maeno H, Emoto M, Yoshida M, Kawamura T, Sakakibara S, Ishiguro S, Osakabe M. Integrated radiation monitoring and interlock system for the LHD deuterium experiments. Fusion Engineering and Design 2018. [DOI: 10.1016/j.fusengdes.2018.02.067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Hawryluk R, Barnes CW, Batha S, Beer M, Bell M, Bell R, Berk H, Bitter M, Bretz N, Budny R, Bush C, Cauffman S, Chang CS, Chang Z, Cheng C, Darrow D, Dendy R, Dorland W, Dudek L, Duong H, Durst R, Efthimion P, Evenson H, Fisch N, Fisher R, Fonck R, Forrest C, Fredrickson E, Fu G, Furth H, Gorelenkov N, Grek B, Grisham L, Hammett G, Heidbrink W, Herrmann H, Herrmann M, Hill K, Hooper B, Hosea J, Houlberg W, Hughes M, Jassby D, Jobes F, Johnson D, Kaita R, Kamperschroer J, Kesner J, Krazilniknov A, Kugel H, Kumar A, LaMarche P, LeBlanc B, Levine J, Levinton F, Lin Z, Machuzak J, Majeski R, Mansfield D, Mazzucato E, Mauel M, McChesney J, McGuire K, McKee G, Meade D, Medley S, Mikkelsen D, Mimov S, Mueller D, Navratil G, Nazikian R, Nevins B, Okabayashi M, Osakabe M, Owens D, Park H, Park W, Paul S, Petrov M, Phillips C, Phillips M, Phillips P, Ramsey A, Redi M, Rewoldt G, Rice B, Rogers J, Roquemore A, Ruskov E, Sabbagh S, Sasao M, Schilling G, Schmidt G, Scott S, Semenov I, Skinner C, Spong D, Strachan J, Strait E, Stratton B, Synakowski E, Takahashi H, Tang W, Taylor G, Goeler SV, Halle AV, White R, Williams M, Wilson J, Wong K, Wurden G, Young K, Zarnstorff M, Zweben S. Review of D-T Results from TFTR. ACTA ACUST UNITED AC 2018. [DOI: 10.13182/fst96-a11963011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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17
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Geng S, Tsumori K, Nakano H, Kisaki M, Ikeda K, Osakabe M, Nagaoka K, Takeiri Y, Shibuya M. Response of H− ions to extraction field in a negative hydrogen ion source. Fusion Engineering and Design 2017. [DOI: 10.1016/j.fusengdes.2017.02.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Nakamura Y, Tamura N, Kobayashi M, Yoshimura S, Suzuki C, Yoshinuma M, Goto M, Motojima G, Nagaoka K, Tanaka K, Sakamoto R, Peterson B, Ida K, Osakabe M, Morisaki T. A comprehensive study on impurity behavior in LHD long pulse discharges. Nuclear Materials and Energy 2017. [DOI: 10.1016/j.nme.2016.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Osakabe M, Takeiri Y, Morisaki T, Motojima G, Ogawa K, Isobe M, Tanaka M, Murakami S, Shimizu A, Nagaoka K, Takahashi H, Nagasaki K, Takahashi H, Fujita T, Oya Y, Sakamoto M, Ueda Y, Akiyama T, Kasahara H, Sakakibara S, Sakamoto R, Tokitani M, Yamada H, Yokoyama M, Yoshimura Y. Current Status of Large Helical Device and Its Prospect for Deuterium Experiment. Fusion Science and Technology 2017. [DOI: 10.1080/15361055.2017.1335145] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M. Osakabe
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - G. Motojima
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K. Ogawa
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M. Isobe
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M. Tanaka
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Mechanical Engineering and Science, Kyoto 615-8540, Japan
| | - A. Shimizu
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - H. Takahashi
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K. Nagasaki
- Kyoto University, Institute of Advanced Energy, Gokasho, Uji, Kyoto 611-0011, Japan
| | - H. Takahashi
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T. Fujita
- Nagoya University, Department of Energy Engineering and Science, Graduate School of Engineering, Furo-cho, Chikusa-ku, Nagoya 464-8093, Japan
| | - Y. Oya
- Shizuoka University, Radioscience Research Laboratory, Faculty of Science, 836, Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - M. Sakamoto
- University of Tsukuba, Plasma Research Center, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Ueda
- Osaka University, Graduate School of Engineering, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - T. Akiyama
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S Sakakibara
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - R. Sakamoto
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M. Tokitani
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - H. Yamada
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
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20
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Komori A, Morisaki T, Mutoh T, Sakakibara S, Takeiri Y, Kumazawa R, Kubo S, Ida K, Morita S, Narihara K, Shimozuma T, Tanaka K, Watanabe KY, Yamada H, Yoshinuma M, Akiyama T, Ashikawa N, Emoto M, Funaba H, Goto M, Ido T, Ikeda K, Inagaki S, Isobe M, Igami H, Itoh K, Kaneko O, Kawahata K, Kobuchi T, Masuzaki S, Matsuoka K, Minami T, Miyazawa J, Muto S, Nagayama Y, Nakamura Y, Nakanishi H, Narushima Y, Nishimura K, Nishiura M, Nishizawa A, Noda N, Ohdachi S, Oka Y, Osakabe M, Ohyabu N, Ozaki T, Peterson BJ, Sagara A, Saito K, Sakamoto R, Sato K, Sato M, Seki T, Shoji M, Sudo S, Tamura N, Toi K, Tokuzawa T, Tsumori K, Uda T, Watari T, Yamada I, Yokoyama M, Yoshimura Y, Motojima O, Beidler CD, Fujita T, Isayama A, Sakamoto Y, Takenaga H, Goncharov P, Ishii K, Sakamoto M, Murakami S, Notake T, Takeuchi N, Okajima S, Sasao M. Overview of Progress in LHD Experiments. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1229] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Komori
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Sakakibara
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Tanaka
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Y. Watanabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H. Yamada
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Yoshinuma
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Akiyama
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Emoto
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Ido
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Inagaki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Isobe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Itoh
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Kawahata
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Kobuchi
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Matsuoka
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Minami
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - J. Miyazawa
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Muto
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H. Nakanishi
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Narushima
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Nishimura
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Nishiura
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - A. Nishizawa
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - N. Noda
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Ohdachi
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Oka
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Ozaki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - A. Sagara
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - R. Sakamoto
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Sato
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Sato
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Shoji
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Sudo
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - N. Tamura
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Toi
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Uda
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - I. Yamada
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - O. Motojima
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - C. D. Beidler
- Max-Planck Institut fuer Plasmaphysik, Greifswald D-17491, Germany
| | - T. Fujita
- Japan Atomic Energy Research Institute, Naka 311-0193, Japan
| | - A. Isayama
- Japan Atomic Energy Research Institute, Naka 311-0193, Japan
| | - Y. Sakamoto
- Japan Atomic Energy Research Institute, Naka 311-0193, Japan
| | - H. Takenaga
- Japan Atomic Energy Research Institute, Naka 311-0193, Japan
| | - P. Goncharov
- Graduate University for Advanced Studies, School of Mathematical and Physical Science Department of Fusion Science, Hayama 240-0193, Japan
| | - K. Ishii
- Kyushu University, Research Institute for Applied Mechanics Kasuga 816-8580, Japan
| | - M. Sakamoto
- Kyushu University, Research Institute for Applied Mechanics Kasuga 816-8580, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - T. Notake
- Nagoya University, Department of Energy Engineering and Science Nagoya 464-8603, Japan
| | - N. Takeuchi
- Nagoya University, Department of Energy Engineering and Science Nagoya 464-8603, Japan
| | - S. Okajima
- Chubu University, Kasugai, Aichi 487-8501, Japan
| | - M. Sasao
- Tohoku University, Graduate School of Engineering, Sendai 980-8579, Japan
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Yamada H, Ida K, Murakami S, Watanabe KY, Ascasibar E, Brakel R, Dinklage A, Harris JH, Okamura S, Sano F, Stroth U, Inagaki S, Tanaka K, Goto M, Nishimura K, Narihara K, Morita S, Sakakibara S, Peterson BJ, Sakamoto R, Miyazawa J, Morisaki T, Osakabe M, Toi K, Tamura N, Ikeda K, Yamazaki K, Kawahata K, Kaneko O, Ohyabu N, Komori A, Motojima O. Configuration Effect on Energy Confinement and Local Transport in LHD and Contribution to the International Stellarator Database. Fusion Science and Technology 2017. [DOI: 10.13182/fst04-a543] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. Yamada
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - K. Y. Watanabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | | | - R. Brakel
- Max-Planck-Institut für Plasmaphysik, D-17941 Greifswald, Germany
| | - A. Dinklage
- Max-Planck-Institut für Plasmaphysik, D-17941 Greifswald, Germany
| | - J. H. Harris
- Australian National University, Plasma Research Laboratory, Canberra, ACT 0200, Australia
| | - S. Okamura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - F. Sano
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - U. Stroth
- University of Kiel, Institute of Experimental and Applied Physics, 24098 Kiel, Germany
| | - S. Inagaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - K. Tanaka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - K. Nishimura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - S. Sakakibara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - R. Sakamoto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | | | - T. Morisaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - K. Toi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - N. Tamura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - K. Yamazaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - K. Kawahata
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - A. Komori
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
| | - O. Motojima
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi Gifu-ken 509-5292, Japan
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Kumazawa R, Mutoh T, Saito K, Seki T, Kasahara H, Tokitani M, Masuzaki S, Ashikawa N, Nakamura Y, Kubo S, Shimozuma T, Yoshimura Y, Igami H, Takahashi H, Takeiri Y, Tsumori K, Osakabe M, Ikeda K, Nagaoka K, Kaneko O, Goto M, Sato K, Chikaraishi H, Ida K, Nagayama Y, Zhao Y, Kwak JG, Yoon JS. Progress in Steady-State Plasma Operation Using ICRF Heating on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10839] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Tokitani
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Takahashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Sato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Chikaraishi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Zhao
- Institute of Plasma Physics, Chinese Academy of Science, Hefei 230031, China
| | - J. G. Kwak
- Korea Advanced Energy Research Institute, 150 Deogjin-dong, Yuseong-gu, Daejeon, Republic of Korea
| | - J. S. Yoon
- Korea Advanced Energy Research Institute, 150 Deogjin-dong, Yuseong-gu, Daejeon, Republic of Korea
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Shimozuma T, Yokoyama M, Ida K, Takeiri Y, Kubo S, Murakami S, Wakasa A, Idei H, Yoshimura Y, Notake T, Inagaki S, Tamura N, Toi K, Ohyabu N, Osakabe M, Ikeda K, Tsumori K, Oka Y, Nagaoka K, Kaneko O, Yamada I, Narihara K, Nagayam Y, Muto S, Tanaka K, Tokuzawa T, Morita S, Goto M, Yoshinuma M, Funaba H, Morisaki T, Watanabe KY, Miyazawa J, Mutoh T, Watari T, Ohkubo K. Improvement of Plasma Core Confinement Via Electron-Root Realization by Strongly Focused ECRH in LHD: Core Electron-Root Confinement. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10791] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - A. Wakasa
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - H. Idei
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Notake
- RIKEN, Tera-Photonics Laboratory, Aoba Sendai-City, Miyagi 980-0845, Japan
| | - S. Inagaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - N. Tamura
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - K. Toi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Oka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - I. Yamada
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nagayam
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Muto
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tanaka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yoshinuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Y. Watanabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - J. Miyazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ohkubo
- National Institute for Fusion Science, Toki 509-5292, Japan
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Todo Y, Murakami S, Yamamoto T, Fukuyama A, Spong DA, Yamamoto S, Osakabe M, Nakajima N. Numerical Analyses of Energetic Particles in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10814] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Todo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - T. Yamamoto
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - A. Fukuyama
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - D. A. Spong
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - S. Yamamoto
- Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Nakajima
- National Institute for Fusion Science, Toki 509-5292, Japan
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Takeiri Y, Kaneko O, Tsumori K, Osakabe M, Ikeda K, Nagaoka K, Nakano H, Asano E, Kondo T, Sato M, Shibuya M, Komada S. High Performance of Neutral Beam Injectors for Extension of LHD Operational Regime. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10834] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Nakano
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - E. Asano
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Kondo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Sato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Shibuya
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Komada
- National Institute for Fusion Science, Toki 509-5292, Japan
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26
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Yoshinuma M, Ida K, Yokoyama M, Osakabe M, Nagaoka K, Morita S, Goto M, Tamura N, Suzuki C, Yoshimura S, Funaba H, Takeiri Y, Ikeda K, Tsumori K, Kaneko O. Spontaneous Toroidal Flow and Impurity Hole in the High Ion Temperature Plasma on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10797] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Yoshinuma
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - N. Tamura
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - C. Suzuki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Yoshimura
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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27
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Tsumori K, Takeiri Y, Kaneko O, Osakabe M, Ando A, Ikeda K, Nagaoka K, Nakano H, Asano E, Shibuya M, Sato M, Kondo T, Komada M. Research and Development Activities on Negative Ion Sources. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10835] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Tsumori
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - A. Ando
- Tohoku University, Department of Electrical Engineering, 6-6-05 Aoba-yama, Aoba, Sendai 980-8579, Japan
| | - K. Ikeda
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - H. Nakano
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - E. Asano
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - M. Shibuya
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - M. Sato
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - T. Kondo
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
| | - M. Komada
- National Institute for Fusion Science, 322-6 Orosh-cho, Toki-city, Gifu 509-5292, Japan
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28
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Saito K, Kumazawa R, Seki T, Kasahara H, Osakabe M, Isobe M, Shimpo F, Nomura G, Watari T, Murakami S, Sasao M, Mutoh T. ICRF Heating and Ion Tail Formation in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10838] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - F. Shimpo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - G. Nomura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - M. Sasao
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
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29
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Osakabe M, Isobe M, Murakami S, Kobayashi S, Saito K, Kumazawa R, Mutoh T, Ozaki T, Nishiura M, Veshchev E, Seki T, Takeiri Y, Kaneko O, Nagaoka K, Tokuzawa T, Ogawa K, Toi K, Yamamoto S, Sasao M, Watanabe T. Fast-Ion Confinement Studies on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10800] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - S. Kobayashi
- Institute of Advanced Energy, Kyoto University, Gokashou, Uji 611-0011, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Ozaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Nishiura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - E. Veshchev
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ogawa
- Nagoya University, Department of Energy Science and Engineering, Nagoya 464-8603, Japan
| | - K. Toi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Yamamoto
- Institute of Advanced Energy, Kyoto University, Gokashou, Uji 611-0011, Japan
| | - M. Sasao
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Watanabe
- National Institute for Fusion Science, Toki 509-5292, Japan
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30
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Nagaoka K, Takeiri Y, Morita S, Ida K, Yokoyama M, Yoshinuma M, Funaba H, Murakami S, Minami T, Tanaka K, Ido T, Shimizu A, Ikeda K, Osakabe M, Tsumori K, Kaneko O. Ion Heating Experiments and Improvement of Ion Heat Transport in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst58-46] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yoshinuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - T. Minami
- Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan
| | - K. Tanaka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Ido
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Shimizu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
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31
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Isobe M, Osakabe M, Ozaki T, Nishiura M, Goncharov PV, Veshchev E, Ogawa K, Nagaoka K, Saito K, Murakami S, Saida T, Sasao M, Toi K. Fast-Particle Diagnostics on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10828] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Ozaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Nishiura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | - E. Veshchev
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ogawa
- Nagoya University, Department of Energy Science and Engineering, Nagoya 464-8603, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - T. Saida
- Tohoku University, Department of Quantum Energy Science, Sendai 980-8579, Japan
| | - M. Sasao
- Tohoku University, Department of Quantum Energy Science, Sendai 980-8579, Japan
| | - K. Toi
- National Institute for Fusion Science, Toki 509-5292, Japan
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32
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Kaneko O, Takeiri Y, Tsumori K, Osakabe M, Ikeda K, Nagaoka K, Nakano H. Plasma Initiation by Neutral Beam Injection. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10836] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- O. Kaneko
- National Institute for Fusion Science, 322-6 Oroshi, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, 322-6 Oroshi, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, 322-6 Oroshi, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, 322-6 Oroshi, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, 322-6 Oroshi, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, 322-6 Oroshi, Toki 509-5292, Japan
| | - H. Nakano
- National Institute for Fusion Science, 322-6 Oroshi, Toki 509-5292, Japan
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33
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Takeiri Y, Kubo S, Shimozuma T, Yokoyama M, Osakabe M, Ikeda K, Tsumori K, Oka Y, Nagaoka K, Yoshimura Y, Ida K, Funaba H, Murakami S, Tanaka K, Peterson BJ, Yamada I, Ohyabu N, Ohkubo K, Kaneko O, Komori A. Electron ITB Formation with Combination of NBI and ECH in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst04-a546] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Oka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - K. Tanaka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - I. Yamada
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ohkubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Komori
- National Institute for Fusion Science, Toki 509-5292, Japan
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Seki T, Mutoh T, Kumazawa R, Saito K, Nakamura Y, Sakamoto M, Watanabe T, Kubo S, Shimozuma T, Yoshimura Y, Igami H, Ohkubo K, Takeiri Y, Oka Y, Tsumori K, Osakabe M, Ikeda K, Nagaoka K, Kaneko O, Miyazawa J, Morita S, Narihara K, Shoji M, Masuzaki S, Goto M, Morisaki T, Peterson BJ, Sato K, Tokuzawa T, Ashikawa N, Nishimura K, Funaba H, Chikaraishi H, Takeuchi N, Notake T, Ogawa H, Torii Y, Shimpo F, Nomura G, Yokota M, Takahashi C, Kato A, Takase Y, Kasahara H, Ichimura M, Higaki H, Zhao YP, Kwak JG, Yamada H, Kawahata K, Ohyabu N, Ida K, Nagayama Y, Noda N, Watari T, Komori A, Sudo S, Motojima O. Study of Long-Pulse Plasma Experiment Using ICRF Heating in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | - T. Watanabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ohkubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Oka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - J. Miyazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Shoji
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Sato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nishimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Chikaraishi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Takeuchi
- Nagoya University, Faculty of Engineering, Nagoya 464-8601, Japan
| | - T. Notake
- Nagoya University, Faculty of Engineering, Nagoya 464-8601, Japan
| | - H. Ogawa
- Graduate University for Advanced Studies, Hayama 240-0162, Japan
| | - Y. Torii
- Kyoto University, Institute of Advanced Energy, Uji 611-0011, Japan
| | - F. Shimpo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - G. Nomura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yokota
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Takahashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Kato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | | | | | - H. Higaki
- University of Tsukuba, Tsukuba, Japan
| | - Y. P. Zhao
- Institute of Plasma Physics, Academia Sinica, Hefei 230031, P.R. China
| | - J. G. Kwak
- Korea Atomic Energy Research Institute, Daejeon 305-600, Korea Rep
| | - H. Yamada
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Kawahata
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Noda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Komori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Sudo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Motojima
- National Institute for Fusion Science, Toki 509-5292, Japan
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35
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Yoshinuma M, Ida K, Yokoyama M, Osakabe M, Nagaoka K. Charge-Exchange Spectroscopy with Pitch-Controlled Double-Slit Fiber Bundle on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10823] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Yoshinuma
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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36
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Funaba H, Watanabe KY, Sakakibara S, Murakami S, Yamada I, Narihara K, Tanaka K, Tokuzawa T, Osakabe M, Narushima Y, Yokoyama M, Ohdachi S, Takeiri Y, Yamada H, Kawahata K. Local Transport Property of High-Beta Plasmas on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. Funaba
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Y. Watanabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Sakakibara
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - I. Yamada
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Tanaka
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Narushima
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - S. Ohdachi
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H. Yamada
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Kawahata
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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37
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Toi K, Isobe M, Osakabe M, Watanabe F, Ogawa K, Yamamoto S, Nakajima N, Spong DA, Ida K, Ido T, Ito T, Morita S, Nagaoka K, Narihara K, Nishiura M, Ohdachi S, Sakakibara S, Shimizu A, Tanaka K, Todo Y, Tokuzawa T, Weller A. MHD Modes Destabilized by Energetic Ions on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10805] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Toi
- National Institute for Fusion Science, Toki, Japan
| | - M. Isobe
- National Institute for Fusion Science, Toki, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki, Japan
| | - F. Watanabe
- Department of Energy Engineering and Science, Nagoya University, Nagoya, Japan
| | - K. Ogawa
- Department of Energy Engineering and Science, Nagoya University, Nagoya, Japan
| | - S. Yamamoto
- Institute of Advanced Energy, Kyoto University, Uji, Japan
| | - N. Nakajima
- National Institute for Fusion Science, Toki, Japan
| | - D. A. Spong
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - K. Ida
- National Institute for Fusion Science, Toki, Japan
| | - T. Ido
- National Institute for Fusion Science, Toki, Japan
| | - T. Ito
- Department of Energy Engineering and Science, Nagoya University, Nagoya, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki, Japan
| | - K. Narihara
- National Institute for Fusion Science, Toki, Japan
| | - M. Nishiura
- National Institute for Fusion Science, Toki, Japan
| | - S. Ohdachi
- National Institute for Fusion Science, Toki, Japan
| | | | - A. Shimizu
- National Institute for Fusion Science, Toki, Japan
| | - K. Tanaka
- National Institute for Fusion Science, Toki, Japan
| | - Y. Todo
- National Institute for Fusion Science, Toki, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki, Japan
| | - A. Weller
- Max-Planck Institut für Plasma Physik, Greifswald, Germany
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38
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Motojima O, Yamada H, Komori A, Watanabe KY, Mutoh T, Takeiri Y, Ida K, Akiyama T, Asakura N, Ashikawa N, Chikaraishi H, Cooper WA, Emoto M, Fujita T, Fujiwara M, Funaba H, Goncharov P, Goto M, Hamada Y, Higashijima S, Hino T, Hoshino M, Ichimura M, Idei H, Ido T, Ikeda K, Imagawa S, Inagaki S, Isayama A, Isobe M, Itoh T, Itoh K, Kado S, Kalinina D, Kaneba T, Kaneko O, Kato D, Kato T, Kawahata K, Kawashima H, Kawazome H, Kobuchi T, Kondo K, Kubo S, Kumazawa R, Lyon JF, Maekawa R, Mase A, Masuzaki S, Mito T, Matsuoka K, Miura Y, Miyazawa J, More R, Morisaki T, Morita S, Murakami I, Murakami S, Mutoh S, Nagaoka K, Nagasaki K, Nagayama Y, Nakamura Y, Nakanishi H, Narihara K, Narushima Y, Nishimura H, Nishimura K, Nishiura M, Nishizawa A, Noda N, Notake T, Nozato H, Ohdachi S, Ohkubo K, Ohyabu N, Oyama N, Oka Y, Okada H, Osakabe M, Ozaki T, Peterson BJ, Sagara A, Saida T, Saito K, Sakakibara S, Sakamoto M, Sakamoto R, Sasao M, Sato K, Seki T, Shimozuma T, Shoji M, Sudo S, Takagi S, Takahashi Y, Takase Y, Takenaga H, Takeuchi N, Tamura N, Tanaka K, Tanaka M, Toi K, Takahata K, Tokuzawa T, Torii Y, Tsumori K, Watanabe F, Watanabe M, Watanabe T, Watari T, Yamada I, Yamada S, Yamaguchi T, Yamamoto S, Yamazaki K, Yanagi N, Yokoyama M, Yoshida N, Yoshimura S, Yoshimura Y, Yoshinuma M. Review on the Progress of the LHD Experiment. Fusion Science and Technology 2017. [DOI: 10.13182/fst04-a535] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- O. Motojima
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Yamada
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - A. Komori
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Y. Watanabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Akiyama
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - N. Asakura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Chikaraishi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - W. A. Cooper
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Emoto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Fujita
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Fujiwara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - P. Goncharov
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Hamada
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Higashijima
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Hino
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Hoshino
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Ichimura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Idei
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Ido
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Imagawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Inagaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - A. Isayama
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Isobe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Itoh
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Itoh
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Kado
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - D. Kalinina
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Kaneba
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - D. Kato
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Kato
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Kawahata
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Kawashima
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Kawazome
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Kobuchi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Kondo
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - J. F. Lyon
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - R. Maekawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - A. Mase
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Mito
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Matsuoka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Miura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - J. Miyazawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - R. More
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - I. Murakami
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Murakami
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Mutoh
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Nagasaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Nakanishi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Narushima
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Nishimura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Nishimura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Nishiura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - A. Nishizawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - N. Noda
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Notake
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Nozato
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Ohdachi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Ohkubo
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - N. Oyama
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Oka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Okada
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Ozaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - A. Sagara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Saida
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Sakakibara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Sakamoto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - R. Sakamoto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Sasao
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Sato
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Shoji
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Sudo
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Takagi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Takahashi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Takase
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - H. Takenaga
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - N. Takeuchi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - N. Tamura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Tanaka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Tanaka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Toi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Takahata
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Torii
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - F. Watanabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Watanabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Watanabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - I. Yamada
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Yamada
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Yamaguchi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Yamamoto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - K. Yamazaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - N. Yanagi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - N. Yoshida
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Yoshimura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
| | - M. Yoshinuma
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu-ken 509-5292, Japan
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39
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Murakami S, Yamada H, Sasao M, Isobe M, Ozaki T, Saida T, Goncharov P, Lyon JF, Osakabe M, Seki T, Takeiri Y, Oka Y, Tumori K, Ikeda K, Mutoh T, Kumazawa R, Saito K, Torii Y, Watari T, Wakasa A, Watanabe KY, Funaba H, Yokoyama M. Effect of Neoclassical Transport Optimization on Energetic Ion Confinement in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst04-a561] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - H. Yamada
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Sasao
- Tohoku University, Graduate School of Engineering, Sendai 980-8579, Japan
| | - M. Isobe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Ozaki
- Tohoku University, Graduate School of Engineering, Sendai 980-8579, Japan
| | - T. Saida
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - P. Goncharov
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8072
| | - J. F. Lyon
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Oka
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Tumori
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Torii
- Nagoya University, Department of Energy Engineering and Science, 464-8603, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - A. Wakasa
- Hokkaido University, Graduate School of Engineering, Sapporo 060-8628, Japan
| | - K. Y. Watanabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Yokoyama
- Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-17491 Greifswald, Germany
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40
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Du XD, Toi K, Ohdachi S, Watanabe KY, Takahashi H, Yoshimura Y, Osakabe M, Seki R, Nicolas T, Tsuchiya H, Nagaoka K, Ogawa K, Tanaka K, Isobe M, Yokoyama M, Yoshinuma M, Kubo S, Sakakibara S, Bando T, Ido T, Ozaki T, Suzuki Y, Takemura Y. Suppression of Trapped Energetic Ions Driven Resistive Interchange Modes with Electron Cyclotron Heating in a Helical Plasma. Phys Rev Lett 2017; 118:125001. [PMID: 28388197 DOI: 10.1103/physrevlett.118.125001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Indexed: 06/07/2023]
Abstract
The resistive interchange mode destabilized by the resonant interaction with the trapped energetic ions is fully suppressed when the injected power of electron cyclotron heating exceeds a certain threshold. It is shown for the first time that the complete stabilization of the energetic-particle-driven mode without relaxing the energetic particle (EP) pressure gradient is possible by reducing the radial width of the eigenmodes δ_{w}, especially when δ_{w} narrows to a small enough value relative to the finite orbit width of EP.
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Affiliation(s)
- X D Du
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - K Toi
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - S Ohdachi
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - K Y Watanabe
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - H Takahashi
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - Y Yoshimura
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - M Osakabe
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - R Seki
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - T Nicolas
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - H Tsuchiya
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - K Nagaoka
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - K Ogawa
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - K Tanaka
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - M Isobe
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - M Yokoyama
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - M Yoshinuma
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - S Kubo
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - S Sakakibara
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - T Bando
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - T Ido
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - T Ozaki
- National Institute for Fusion Science, 509-5292 Toki, Japan
| | - Y Suzuki
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
| | - Y Takemura
- National Institute for Fusion Science, 509-5292 Toki, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, 509-5292 Toki, Japan
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41
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Mutoh* T, Nagaoka K, Takahashi H, Kasahara H, Osakabe M, Kubo S, Shimozuma T, Yoshimura Y, Tsumori K, Seki T, Saito K, Igami H, Nakano H, Ikeda K, Kisaki M, Seki R, Kamio S, Ii T, Nakamura Y, Takeiri Y, Kaneko O. High Power Heating and Steady State Operation in the Large Helical Device. Fusion Science and Technology 2017. [DOI: 10.13182/fst15-120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Mutoh*
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - H. Takahashi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - H. Nakano
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - M. Kisaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - R. Seki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - S. Kamio
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - T. Ii
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
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42
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Tokuzawa T, Kisaki M, Nagaoka K, Tsumori K, Ito Y, Ikeda K, Nakano H, Osakabe M, Takeiri Y, Kaneko O. Upgraded millimeter-wave interferometer for measuring the electron density during the beam extraction in the negative ion source. Rev Sci Instrum 2016; 87:11E105. [PMID: 27910614 DOI: 10.1063/1.4959841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The upgraded millimeter-wave interferometer with the frequency of 70 GHz is installed on a large-scaled negative ion source. Measurable line-averaged electron density is from 2 × 1015 to 3 × 1018 m-3 in front of the plasma grid. Several improvements such as the change to shorter wavelength probing with low noise, the installation of special ordered horn antenna, the signal modulation for a high accuracy digital phase detection, the insertion of insulator, and so on, are carried out for the measurement during the beam extraction by applying high voltage. The line-averaged electron density is successfully measured and it is found that it increases linearly with the arc power and drops suddenly at the beam extraction.
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Affiliation(s)
- T Tokuzawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Kisaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Nagaoka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Tsumori
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y Ito
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ikeda
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - H Nakano
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y Takeiri
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - O Kaneko
- National Institutes of Natural Sciences, 4-3-13 Toranomon, Minato-ku, Tokyo 105-0001, Japan
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43
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Geng S, Tsumori K, Nakano H, Kisaki M, Ikeda K, Osakabe M, Nagaoka K, Takeiri Y, Shibuya M, Kaneko O. Charged particle flows in the beam extraction region of a negative ion source for NBI. Rev Sci Instrum 2016; 87:02B103. [PMID: 26931985 DOI: 10.1063/1.4931796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Experiments by a four-pin probe and photodetachment technique were carried out to investigate the charged particle flows in the beam extraction region of a negative hydrogen ion source for neutral beam injector. Electron and positive ion flows were obtained from the polar distribution of the probe saturation current. Negative hydrogen ion flow velocity and temperature were obtained by comparing the recovery times of the photodetachment signals at opposite probe tips. Electron and positive ions flows are dominated by crossed field drift and ambipolar diffusion. Negative hydrogen ion temperature is evaluated to be 0.12 eV.
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Affiliation(s)
- S Geng
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Tsumori
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - H Nakano
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Kisaki
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Ikeda
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Osakabe
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Nagaoka
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - Y Takeiri
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Shibuya
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - O Kaneko
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
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44
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Kisaki M, Ikeda K, Osakabe M, Tsumori K, Nakano H, Geng S, Nagaoka K, Kaneko O, Takeiri Y. Improvement of accelerator of negative ion source on the Large Helical Device. Rev Sci Instrum 2016; 87:02B321. [PMID: 26932049 DOI: 10.1063/1.4936249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
To improve the performance of negative-ion based neutral beam injection on the Large Helical Device, the accelerator was modified on the basis of numerical investigations. A field limiting ring was installed on the upper side of a grounded grid (GG) support and a multi-slot GG was adopted instead of a multi-aperture GG. As a result, the voltage holding capability is improved and the heat load on the GG decreases by 40%. In addition, the arc efficiency is improved significantly only by replacing the GG.
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Affiliation(s)
- M Kisaki
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Ikeda
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Tsumori
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - H Nakano
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - S Geng
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Nagaoka
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - O Kaneko
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - Y Takeiri
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
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45
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Ikeda K, Wünderlich D, Fantz U, Heinemann B, Kisaki M, Nagaoka K, Nakano H, Osakabe M, Tsumori K, Geng S, Kaneko O, Takeiri Y. Installation of spectrally selective imaging system in RF negative ion source. Rev Sci Instrum 2016; 87:02B113. [PMID: 26931995 DOI: 10.1063/1.4932987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A spectrally selective imaging system has been installed in the RF negative ion source in the International Thermonuclear Experimental Reactor-relevant negative ion beam test facility ELISE (Extraction from a Large Ion Source Experiment) to investigate distribution of hydrogen Balmer-α emission (Hα) close to the production surface of hydrogen negative ion. We selected a GigE vision camera coupled with an optical band-path filter, which can be controlled remotely using high speed network connection. A distribution of Hα emission near the bias plate has been clearly observed. The same time trend on Hα intensities measured by the imaging diagnostic and the optical emission spectroscopy is confirmed.
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Affiliation(s)
- K Ikeda
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - D Wünderlich
- Max-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, 85748 Garching, Germany
| | - U Fantz
- Max-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, 85748 Garching, Germany
| | - B Heinemann
- Max-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, 85748 Garching, Germany
| | - M Kisaki
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Nagaoka
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - H Nakano
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Tsumori
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - S Geng
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki 509-5292, Japan
| | - O Kaneko
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - Y Takeiri
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
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46
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Tsumori K, Ikeda K, Nakano H, Kisaki M, Geng S, Wada M, Sasaki K, Nishiyama S, Goto M, Serianni G, Agostinetti P, Sartori E, Brombin M, Veltri P, Wimmer C, Nagaoka K, Osakabe M, Takeiri Y, Kaneko O. Negative ion production and beam extraction processes in a large ion source (invited). Rev Sci Instrum 2016; 87:02B936. [PMID: 26932108 DOI: 10.1063/1.4938254] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Recent research results on negative-ion-rich plasmas in a large negative ion source have been reviewed. Spatial density and flow distributions of negative hydrogen ions (H(-)) and positive hydrogen ions together with those of electrons are investigated with a 4-pin probe and a photodetachment (PD) signal of a Langmuir probe. The PD signal is converted to local H(-) density from signal calibration to a scanning cavity ring down PD measurement. Introduction of Cs changes the slope of plasma potential local distribution depending upon the plasma grid bias. A higher electron density H2 plasma locally shields the bias potential and behaves like a metallic free electron gas. On the other hand, the bias and extraction electric fields penetrate in a Cs-seeded electronegative plasma even when the electron density is similar. Electrons are transported by the penetrated electric fields from the driver region along and across the filter and electron deflection magnetic fields. Plasma ions exhibited a completely different response against the penetration of electric fields.
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Affiliation(s)
- K Tsumori
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Ikeda
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - H Nakano
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Kisaki
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - S Geng
- The Graduate University for Advanced Studies, Shonan Village, Hayama, Kanagawa 240-0193, Japan
| | - M Wada
- Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
| | - K Sasaki
- Division of Quantum Science and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - S Nishiyama
- Division of Quantum Science and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - M Goto
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - G Serianni
- Plasma Engineering Group, Consorzio RFX, Corso Stati Uniti 4, 35127 Padova, Italy
| | - P Agostinetti
- Plasma Engineering Group, Consorzio RFX, Corso Stati Uniti 4, 35127 Padova, Italy
| | - E Sartori
- Plasma Engineering Group, Consorzio RFX, Corso Stati Uniti 4, 35127 Padova, Italy
| | - M Brombin
- Plasma Engineering Group, Consorzio RFX, Corso Stati Uniti 4, 35127 Padova, Italy
| | - P Veltri
- Plasma Engineering Group, Consorzio RFX, Corso Stati Uniti 4, 35127 Padova, Italy
| | - C Wimmer
- Max-Planck-Institut für Plasmaphysik, Bereich ITER-Technologie und -Diagnostik/N-NBI Boltzmannstr. 2, 85748 Garching, Germany
| | - K Nagaoka
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - Y Takeiri
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - O Kaneko
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
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47
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Lesur M, Itoh K, Ido T, Osakabe M, Ogawa K, Shimizu A, Sasaki M, Ida K, Inagaki S, Itoh SI. Nonlinear Excitation of Subcritical Instabilities in a Toroidal Plasma. Phys Rev Lett 2016; 116:015003. [PMID: 26799024 DOI: 10.1103/physrevlett.116.015003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Indexed: 06/05/2023]
Abstract
In a collisionless plasma, it is known that linearly stable modes can be destabilized (subcritically) by the presence of structures in phase space. However, nonlinear growth requires the presence of a seed structure with a relatively large threshold in amplitude. We demonstrate that, in the presence of another, linearly unstable (supercritical) mode, wave-wave coupling can provide a seed, which is significantly below the threshold, but can still grow by (and only by) the collaboration of fluid and kinetic nonlinearities. By modeling the subcritical mode kinetically, and the impact of the supercritical mode by simple wave-wave coupling equations, it is shown that this new kind of subcritical instability can be triggered, even when the frequency of the supercritical mode is rapidly sweeping. The model is applied to the bursty onset of geodesic acoustic modes in a LHD experiment. The model recovers several key features such as relative amplitude, time scales, and phase relations. It suggests that the strongest bursts are subcritical instabilities, driven by this mechanism of combined fluid and kinetic nonlinearities.
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Affiliation(s)
- M Lesur
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - K Itoh
- National Institute for Fusion Science, Toki 509-5292, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - T Ido
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki 509-5292, Japan
| | - A Shimizu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M Sasaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - K Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Toki 509-5292, Japan
| | - S Inagaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - S-I Itoh
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
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48
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Ido T, Itoh K, Osakabe M, Lesur M, Shimizu A, Ogawa K, Toi K, Nishiura M, Kato S, Sasaki M, Ida K, Inagaki S, Itoh SI. Strong Destabilization of Stable Modes with a Half-Frequency Associated with Chirping Geodesic Acoustic Modes in the Large Helical Device. Phys Rev Lett 2016; 116:015002. [PMID: 26799023 DOI: 10.1103/physrevlett.116.015002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Indexed: 06/05/2023]
Abstract
Abrupt and strong excitation of a mode has been observed when the frequency of a chirping energetic-particle driven geodesic acoustic mode (EGAM) reaches twice the geodesic acoustic mode (GAM) frequency. The frequency of the secondary mode is the GAM frequency, which is a half-frequency of the primary EGAM. Based on the analysis of spatial structures, the secondary mode is identified as a GAM. The phase relation between the secondary mode and the primary EGAM is locked, and the evolution of the growth rate of the secondary mode indicates nonlinear excitation. The results suggest that the primary mode (EGAM) contributes to nonlinear destabilization of a subcritical mode.
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Affiliation(s)
- T Ido
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Itoh
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Study), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Lesur
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - A Shimizu
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Study), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - K Toi
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Nishiura
- Graduate School of Frontier Sciences, University of Tokyo, 5-1-5 Kashiwanohara, Kashiwa, Chiba 277-8561, Japan
| | - S Kato
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M Sasaki
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - K Ida
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Study), 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - S Inagaki
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - S-I Itoh
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
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49
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Sudo M, Osakabe M. Joint Effect of Solar UVB and Heat Stress on the Seasonal Change of Egg Hatching Success in the Herbivorous False Spider Mite (Acari: Tenuipalpidae). Environ Entomol 2015; 44:1605-1613. [PMID: 26314033 DOI: 10.1093/ee/nvv131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Accepted: 07/22/2015] [Indexed: 06/04/2023]
Abstract
Seasonal population dynamics of an herbivorous mite has been documented in terms of the relationship between thermoresponses and temporal biological factors such as resource availability or predation risk. Although recent studies emphasize the deleterious effects of solar ultraviolet-B (UVB; 280-320 nm wavelengths) radiation on plant-dwelling mites, how UVB affects mite population remains largely unknown. On a wild shrub Viburnum erosum var. punctatum in Kyoto, an herbivorous false spider mite, Brevipalpus obovatus Donnadieu, occurs only in autumn. Females of this species lay one-third of their eggs on upper leaf surfaces. Oviposition on upper surfaces is beneficial for avoiding predation by phytoseiids, but exposes eggs to solar UVB and heat stress. To test the hypothesis that the seasonal occurrence of this mite is determined by interactions between solar UVB radiation and temperature, we examined variation in egg hatching success under near-ambient and UV-attenuated sunlight conditions from spring to autumn. The UV-attenuation significantly improved hatching success. However, most eggs died under heat stress regardless of UV treatments in July and August. We established a deterministic heat stress-cumulative UVB dose-egg hatching success response model, which we applied to meteorological data. The model analyses illustrated lower and higher survivability peaks in late May and October, respectively, which partly corresponded to data for annual field occurrence, indicating the importance of solar UVB radiation and heat stress as determinants of the seasonal occurrence of this mite.
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Affiliation(s)
- M Sudo
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan. Present Address: Natural Resources Inventory Center, National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, Ibaraki 305-8604, Japan.
| | - M Osakabe
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
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50
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Yanagawa N, Osakabe M, Ogata SY, Shiono S. 43P MIB-1 labeling index is useful as prognostic and predictive markers for adjuvant therapy in non-small cell lung cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv518.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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